# Overview

Microsoft Windows 2000 Server uses Active Directory to manage multiple name spaces for Active Directory objects. Active Directory uses Lightweight Directory Access Protocol (LDAP), to provide full read, write, and search capabilities.

When using Microsoft Exchange Server version 5.5 with Windows 2000 Server, some Active Directory objects have e-mail attributes provided by Exchange.

The following table lists the Active Directory objects and their corresponding Exchange directory recipient:

Active Directory Object | Corresponding Exchange Recipient
--- | ---
Users | Mailboxes
Contacts, Users | Custom Recipients
Groups | Distribution Lists

You can configure attributes for each mail-enabled Active Directory object using the Exchange General, E-mail Addresses, and Exchange Advanced tabs in Active Directory Users and Computers. See How to... for information on how to perform administrative tasks for mail-enabled Active Directory objects.